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Alleviating Restrictions on Epitaxial Crystalline Film Growth

Posted on: 11/18/2013
Scientists at the International Center for Materials Nanoarchitectonics (MANA) and the University of Tokyo in Japan have extended the versatility of epitaxial growth techniques using two-dimensional materials. The discovery could expand the use of tailored electronic, optical, and magnetic properties for technological applications.

Epitaxial growth has become increasingly important for growing crystalline thin films for tailored applications, but the approach is limited by the high structural similarities required between an underlying substrate and a growing crystal layer on top of it. The Japanese researchers examined molecularly thin two-dimensional crystals as possible seed layers to alleviate lattice-matching requirements. On different surfaces, they grew different orientations of SrTiO3, an important perovskite for various technological applications.

The approach demonstrated the ability to grow different orientations of SrTiO3 with a high level of precision. The researchers plan to explore achieving more sophisticated control of growth geometry using nanosheets with a complex structure.

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